They said on the news today that this was the first year no living survivors were able to make it back to the ceremony in Hawaii. I believe most of them are in their mid 90s and just weren't able to make the trip.

Also with running a sentry box in your tractor, check the regulated pressure on the flow divider valve. Mine was low and I was having issues with steering. I am pretty sure low pressure will not let the clutch packs shift as they shouldas well. I believe a good pressure setting is in the 275 psi range but not over 300 psi at PTO speed.
Matt